Crime film

Crime films, in the broadest sense, is a film genre inspired by and analogous to the crime fiction literary genre. Films of this genre generally involve various aspects of crime and its detection. Stylistically, the genre may overlap and combine with many other genres, such as drama or gangster film, but also include comedy, and, in turn, is divided into many sub-genres, such as mystery, suspense or noir.

Screenwriter and scholar Eric R. Williams identified crime film as one of eleven super-genres in his Screenwriters Taxonomy, claiming that all feature-length narrative films can be classified by these super-genres. The other ten super-genres are action, fantasy, horror, romance, science fiction, slice of life, sports, thriller, war and western. Williams identifies drama in a broader category called "film type", mystery and suspense as "macro-genres", and film noir as a "screenwriter's pathway" explaining that these categories are additive rather than exclusionary. Chinatown would be an example of a film that is a drama (film type) crime film (super-genre) that is also a noir (pathway) mystery (macro-genre).

Source of plots
Crime films are often based on real events or are adaptations of plays or novels, or a remake or adoption of a previous film. Some plots are original and entirely fictional. For example, the 1957 film version of Witness for the Prosecution is an adaptation of a 1953 stage play of that name, which is in turn based on Agatha Christie's short story, originally published in 1933. The film version was remade in 1982, and there have been other adaptations. However, each of these media has its own advantages and limitations, which in the case of cinema is the time constraint.

Plays and films
Witness for the Prosecution is a classic example of a courtroom drama. In a courtroom drama, a charge is brought against one of the main characters, who claims to be innocent. Another major part is played by the lawyer (in England a barrister) representing the defendant in court and battling with the public prosecutor. They may enlist the services of a private investigator to find out what really happened and who the real perpetrator is. However, in most cases it is not clear at all whether the accused is guilty of the crime or not—this is how suspense is created.

Often, the private investigator storms into the courtroom at the last minute in order to bring a new and crucial piece of information to the attention of the court. This type of literature lends itself to the literary genre of drama focused more on dialogue (the opening and closing statements, the witnesses' testimonies, etc.) and little or no necessity for a shift in scenery. The auditorium of the theatre becomes an extension of the courtroom. When a courtroom drama is filmed, the traditional device employed by screenwriters and directors is the frequent use of flashbacks, in which the crime and everything that led up to it is narrated and reconstructed from different angles.

A classic courtroom drama is U.S. playwright Reginald Rose's Twelve Angry Men (1954), which is set in the jury deliberation room of a New York court. Eleven members of the jury, aiming at a unanimous verdict of "guilty", try to get it over with as quickly as possible. And they would really succeed in achieving their common aim if it were not for the eighth juror (played by Henry Fonda in the 1957 movie adaptation), who, on second thoughts, considers it his duty to convince his colleagues that the defendant may be innocent after all, and who, by doing so, triggers much discussion, confusion, and anger.

Crime comedy
Crime comedy films are a hybrid of the crime film and the comedy that play with the conventions of the crime film and may introduce aspects of dark humor. Generally, they feature dim-witted criminals or crime sprees that are bumblingly executed or are presented in a lighthearted manner. The genre had a resurgence in popularity in the independent film scene of the 1990s, which combined the clichés of the crime thriller with comic appropriations. Examples include Kung Fu Hustle, The Wolf of Wall Street, 22 Jump Street, and Seven Psychopaths.

Crime drama
Crime dramas are films that focus on the moral dilemmas of criminals. They differ from crime thrillers as the films generally focus on a grimmer and more realistic portrayal of the criminal world over violence and gunplay sequences. Occasionally these films begin with the flashier elements of the crime thriller such as in The Godfather, Goodfellas and Once Upon a Time in America to develop into more contemplative narratives. 

Crime thriller
Crime thrillers focus on the exciting elements of both successful and unsuccessful crimes. Unlike police procedurals, they focus on a criminal or a group of criminals rather than law enforcement. These films tend to focus on conspiracies and psychopathology of criminals, and are often violent and nihilistic. Examples include The Killers, The Peacock, Av Mevsimi and Memories of Murder.

Dacoit film
Dacoit films are a genre of Indian cinema revolving around dacoity. The genre was pioneered by Mehboob Khan's Aurat (1940) and Mother India (1957). Other examples include Gunga Jumna (1961), Sholay (1975) and Bandit Queen (1994).

Gangster film
Gangster films are films that tell the story from the perspective of gangsters, who are portrayed as idealistic antiheroes. The gangster film is among the oldest genres of films, with examples dating as early as Underworld, Little Caesar and Scarface. After World War II, these films became increasingly violent and menacing with films like Underworld USA. These films also were made outside the United States in Hong Kong, Japan and France.

Heist film
This film deals with a group of criminals attempting to perform a theft or robbery, as well as the possible consequences that follow. Heist films that are lighter in tone are called caper films. Examples include The Killing, Ocean's 11, Dog Day Afternoon, Reservoir Dogs, Heat and The Town.

Hood film
Apart from telling their own tales of African American gangsters in syndicates, films like Black Caesar feature the Italian mafia prominently. Often the blaxploitation films of the 1970s such as Shaft tell the tale of African American gangsters rising up and defeating the established white criminal order. African Americans were under-represented in filmmaking roles during much of the 20th century. It took African American producers and directors of the 1990s like John Singleton, Spike Lee and the Hughes Brothers to begin exploring the criminal lifestyle in American urban communities, telling stories of drugs, gang culture, gang violence, racism and poverty in African American communities. Examples of films from the 1990s fitting the African-American gangster genre include Boyz N The Hood, Menace II Society and New Jack City.

Mumbai underworld
Mumbai underworld is an Indian cinema crime film genre. The genre frequently draws inspiration from real Mumbai underworld gangsters, such as Haji Mastan, Dawood Ibrahim and D-Company. The genre was pioneered by Salim–Javed's Zanjeer (1973) and Deewaar (1975), starring Amitabh Bachchan. Other examples include the Don franchise (1978–2012), Nayakan (1986), Salaam Bombay! (1988), Parinda (1989), Satya (1998), Company (2002), Black Friday (2004), Slumdog Millionaire (2008) and Once Upon a Time in Mumbaai (2010).

Police procedural
Police procedurals focus on the police who investigate the actions of criminals, with examples such as He Walked by Night, In the Heat of the Night, Madigan, and The French Connection.

Prison film
The prison film is a type of crime film that focuses on the difficult living conditions in prisons, as well as occasionally focusing on inmates adjusting to life outside of prison.

European
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 * Gerhards, Sascha. "Ironizing Identity: The German Crime Genre and the Edgar Wallace Production Trend of the 1960s." in Generic Histories of German Cinema: Genre and its Deviations (Camden House, 2013) pp: 133-155.
 * Hansen, Kim Toft, Steven Peacock, and Sue Turnbull, eds. European television crime drama and beyond (Cham: Palgrave Macmillan, 2018).
 * Marlow-Mann, Alex. "Strategies of Tension: Towards a Reinterpretation of Enzo G. Castellari's The Big Racket and the Italian Crime Film." in Popular Italian Cinema (2013) pp: 133-146.
 * Peacock, Steven. Swedish crime fiction: Novel, film, television (Manchester University Press, 2015).
 * Reisinger, Deborah Streifford. Crime and media in contemporary France (Purdue University Press, 2007).
 * Toft Hansen, Kim, Steven Peacock, and Sue Turnbull. "Down these European mean streets: Contemporary issues in European television crime drama." in European television crime drama and beyond (2018) pp: 1-19. online